magic2.cpp: In function 'void citire()': magic2.cpp:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result magic2.cpp:13: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result magic2.cpp:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result magic2.cpp: In function 'void generare()': magic2.cpp:37: warning: statement has no effect magic2.cpp: In function 'void afisare()': magic2.cpp:76: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result magic2.cpp: In function 'void del(int, int*)': magic2.cpp:114: warning: suggest explicit braces to avoid ambiguous 'else' magic2.cpp: In function 'void bt(int)': magic2.cpp:148: warning: statement has no effect